Visual C#.NET 网络核心编程 笔记

1．  网络流

NetworkStream

 

public NetworkStream{

Socket socket;

}

public NetworkStream{

Socket socket;

bool ownsSocket;

}

public NetworkStream{

Socket socket;

FileAccess access;

}

public NetworkStream{

Socket socket;

FileAccess access;

bool ownsSocket;

}

 

exam:

NetWorkStream newStream = new NetworkStream(mesock,System.IO.FileAccess.Read,true);

 

Read方法

public override int Read{

int byte[] buffer,

int offset,

int size

}

 

exam:

NetWorkStream newStream = new NetworkStream(mesock);

Byte[] myByte = new Byte[64];

newStream.Read(myByte,0,myByte.Length);

newSteam.Flush();

 

Write方法

public override void Write{

byte[] buffer,

int offset,

int size

}

2．  文本流

向文本写文本流

 

StreamWriter sw = null;

//新数据代替旧数据,若参数为true，则新数据在旧数据之后

sw = new StreamWriter(“e://temp//aa.txt”,false,System.Text.Encoding.UTF8);

sw.Write(“aaaaaaaaa”);

sw.Close();

 

向网络写入文本

 

string str = “aaaaaaaaaaaaa”;

byte[] myByte = System.Text.Encoding.UTF8.GetBytes(str);

NetworkStream netStream = new NetworkStream(mysock);

netStream.Write(myByte,0,myByte.Length);

 

从文件读出文本

 

StreamReader sr = null;

sr = new StreamReader(“e://temp//aa.txt”,System.Text.Encoding.UTF8);

string myStr = sr.ReadToEnd();

sr.Close();

 

从网络读取文本

 

string str = “aaaaaaaaaaaa”;

byte[] myByte = System.Text.Encoding.UTF8.GetBytes(str);

NetworkStream netStream = new NetStream(mysock);

netStream.Read(myByte,0,myByte.Length);

 

3．文件流

 

将网络数据写入文件

 

FileStream filestream = new FileStream(path,FileMode.OpenOrCreate,FileAccess.Write);

int readNumber = 0;

byte[] bye = new byte[8];

while((readNumber=stream.Read(bye,0,8))>0)

{

filestream.Write(bye,0,readNumber);

filestream.Flush();

}

filestream.Close();

 

读文件写入网络流

FileStream filestream = new FileStream(path,FileMode.OpenOrCreate,FileAccess.Read);

int number;

byte[] bb = new byte[8];

NetworkStream stream = new NetworkStream(newClient);

       while((number = fileStream.Read(bb,0,8))!=0)

{

              stream.Write(bb,0,8);

stream.Flush();

bb = new byte[8];

}

filestream.Close();

 

4．  命令解析

 

过滤无用字符（命令与参数之间一般以空格<SP>间隔，命令以换行符<CRLF>结束）

byte[] myByte = new Byte[1024];

NetworkStream netStream = new NetworkStream(mysock);

netStream.Read(myByte,0,myByte.Length);

string str = System.Text.Encoding.ASCII.GetString(myByte);

int x = str.Indexof(“/r/n”);

string allcommand = str.Substring(0,x);

char[] a = new char[]{‘ ’};

string commStr = allcommand.Split(a);

string command = commStr[0];

sting parameter1 = commStr[1];

sting parameter2 = commStr[2];

5．  方法参数

params关键字 指定参数数目可变

exam：

private void UseParams(params string[] list)

{

for(int I=0;I<list.Length;i++)

{

textBox1.AppendText(list[i]+”/r/n”);

}

}

 

out 关键字 主要用于返回多个值，也是传递引用

6．  线程

创建：

Thread thread = new Thread(new ThreadStart(accp));

private void accp()

{

…………….

}

 

启动：

thread.start();

 

暂停与重新开始

thread.Sleep(10000)//毫秒

 

thread.Suspend();//暂停

 

thread.Resume();

 

销毁：

thread.Abort();

thread.Join(10000);

 

thread.Join(10000);

thread.Interrupt();